Harvest Technologies Provides Rapid Prototyping - Materials



Harvest Technologies rapid prototyping - Investment and Sand Casting

In the Investment Casting (lost wax) process a mold is created by repeatedly dipping a sprued pattern in ceramic slurry, which builds up a shell around it that hardens. The mold is subsequently autoclaved (steamed) and/or heated to eliminate the pattern. Finally, molten metal is poured into the cavity where it solidifies. Once the cast object has cooled, the shell is broken and removed from the part. The key advantage of this process is its ability to produce complex metal parts quickly and inexpensively without hard tooling.

In the Sand Casting process a mold is created by packing sand slurry that subsequently hardens around the pattern. The mold is pulled away from the pattern and molten metal is poured into the remaining cavity. After cooling and the metal solidifies, the mold is broken and removed from the part. The key advantage of this process is its cost-effectiveness for low volume production of metal parts.

In the Plaster Casting process a mold is created by pouring plaster slurry - which subsequently hardens - around a rubber pattern that was cast in a silicone tool. The plaster molds are cured, and molten metal is poured into the cavity where it solidifies. Once the cast object has cooled, the plaster mold is broken away and discarded.

These three processes, as well as others we utilize, can provide:

• Functional parts, prototypes and models with good detail and dimensional tolerance.
• A wide variety of ferrous and non-ferrous metals and alloys.
• Can be machined for better accuracy, detail and finishing.
• Delivery of part(s) usually in 2 - 4 weeks.